diff options
| author | Sagi Grimberg <sagig@mellanox.com> | 2015-04-14 18:08:15 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-04-15 16:07:12 -0400 |
| commit | e3784bd1d9f1039f28dff2c0c0d17daabb3d6761 (patch) | |
| tree | 3fcdf1f97cf69334da4ea6920634ff2e35427a77 /drivers/infiniband/ulp/iser/iscsi_iser.h | |
| parent | ecc3993a2ad2a4ce8f1a58a08e9177f21015492d (diff) | |
| download | linux-rt-e3784bd1d9f1039f28dff2c0c0d17daabb3d6761.tar.gz | |
IB/iser: Remove a redundant struct iser_data_buf
No need to keep two iser_data_buf structures just in case we use
mem copy. We can avoid that just by adding a pointer to the original
sg. So keep only two iser_data_buf per command (data and protection)
and pass the relevant data_buf to bounce buffer routine.
This patch does not change any functionality.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Adir Lev <adirl@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index b47aea1094b2..5c7036c90766 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -218,20 +218,23 @@ enum iser_data_dir { /** * struct iser_data_buf - iSER data buffer * - * @buf: pointer to the sg list + * @sg: pointer to the sg list * @size: num entries of this sg * @data_len: total beffer byte len * @dma_nents: returned by dma_map_sg * @copy_buf: allocated copy buf for SGs unaligned * for rdma which are copied + * @orig_sg: pointer to the original sg list (in case + * we used a copy) * @sg_single: SG-ified clone of a non SG SC or * unaligned SG */ struct iser_data_buf { - void *buf; + struct scatterlist *sg; unsigned int size; unsigned long data_len; unsigned int dma_nents; + struct scatterlist *orig_sg; char *copy_buf; struct scatterlist sg_single; }; @@ -536,9 +539,7 @@ struct iser_conn { * @dir: iser data direction * @rdma_regd: task rdma registration desc * @data: iser data buffer desc - * @data_copy: iser data copy buffer desc (bounce buffer) * @prot: iser protection buffer desc - * @prot_copy: iser protection copy buffer desc (bounce buffer) */ struct iscsi_iser_task { struct iser_tx_desc desc; @@ -549,9 +550,7 @@ struct iscsi_iser_task { int dir[ISER_DIRS_NUM]; struct iser_regd_buf rdma_regd[ISER_DIRS_NUM]; struct iser_data_buf data[ISER_DIRS_NUM]; - struct iser_data_buf data_copy[ISER_DIRS_NUM]; struct iser_data_buf prot[ISER_DIRS_NUM]; - struct iser_data_buf prot_copy[ISER_DIRS_NUM]; }; struct iser_page_vec { @@ -621,7 +620,6 @@ void iser_free_rx_descriptors(struct iser_conn *iser_conn); void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, struct iser_data_buf *mem, - struct iser_data_buf *mem_copy, enum iser_data_dir cmd_dir); int iser_reg_rdma_mem_fmr(struct iscsi_iser_task *task, |